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Changes in sugar content and related enzyme activities in table grape ( Vitis vinifera L.) in response to foliar selenium fertilizer
Author(s) -
Zhu Shuaimeng,
Liang Yinli,
An Xiaojuan,
Kong Fanchao,
Gao Dekai,
Yin Hongfei
Publication year - 2017
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.8276
Subject(s) - invertase , sugar , sucrose , fructose , chemistry , sucrose phosphate synthase , fertilizer , selenium , food science , berry , horticulture , sucrose synthase , table grape , botany , biology , organic chemistry
Abstract BACKGROUND Spraying selenium (Se) fertilizer is an effective method for Se‐enriched fruit production. Sugar content in fruit is the major factor determining berry quality. However, changes in sugar metabolism in response to Se fertilizer are unclear. Hence, this study was conducted to identify the effects of Se fertilizer on sugar metabolism and related enzyme activities of grape berries. Additionally, production of leaves with and without Se fertilizer was also investigated. RESULTS Acid invertase ( AI ) activity, total soluble sugar and Se content in berries, and photosynthetic rate in leaves produced under Se fertilizer treatments were higher than that of control. Glucose and fructose were the primary sugars in berries, with a trace of sucrose. In both berries and leaves, neutral invertase activity was lower than AI , there was no significant difference in neutral invertase, sucrose synthase and sucrose phosphate synthase between Se fertilizer‐treated and control. In berries, AI showed a significant positive correlation with glucose and fructose; also Se content was significantly correlated with sugar content. CONCLUSION AI played an important role in the process of sugar accumulation in berries; high AI activity in berries and photosynthetic rate in leaves could explain the mechanism by which Se fertilizer affected sugar accumulation in berries. © 2017 Society of Chemical Industry